Sedimentary structures

Sedimentary structures resulting from the interaction between sediment and bottom current

upright=1.25|thumb|Fresh mudcracks on the shore of The Wash, England Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content.

geologic structures formed during sediment deposition

thumb|Aerial view of Exhumation (geology)|exhumed fluvial palaeochannel, Emery County, Utah. The erosion of softer surrounding mudstone left this palaeochannel as a sandstone ridge.

depositional forms in diluvial plain and mountain scablands

thumb|Current ripples preserved in sandstone of the Moenkopi Formation, [[Capitol Reef National Park, Utah, United States.]]

sedimentary structures formed by the interaction of microbes with sediment and other agents of

bulges, lumps, and lobes that can form on the bedding planes